肖方闹,徐流杰,周玉成,潘昆明,魏世忠

• 1:河南科技大学材料科学与工程学院
• 2:河南科技大学耐磨材料工程技术研究中心

摘要(Abstract)：

采用共沸蒸馏法结合粉末冶金法制备了ZrO_2增强钨合金(W-ZrO_2)。利用XRD、SEM、EDS、TEM等研究了初始溶液的p H值、还原工艺及ZrO_2掺杂量对W-ZrO_2复合粉末粒径及形貌的影响,观察了钨合金的显微组织及其物相组成,测定了复合钨粉的粒度、钨合金的密度、显微硬度及其磨损性能。结果表明:初始溶液的p H值对掺杂钨粉的形貌和尺寸有着显著影响,随着初始溶液的p H值增大,复合粉末颗粒尺寸逐渐增加;经750℃×2 h+850℃×4 h两段还原工艺后所得的复合粉末粒径细小;ZrO_2对复合钨粉颗粒及钨合金晶粒细化作用明显,进而对钨合金密度及硬度产生显著影响,随着ZrO_2含量的增加,钨合金密度与显微硬度降低,耐磨性呈先增加后降低趋势,其中W-3%ZrO_2钨合金的耐磨性较纯钨提高了20%~40%。

关键词(KeyWords)： 共沸蒸馏;钨合金;ZrO2掺杂;硬度;耐磨性

Abstract:

Keywords:

基金项目(Foundation): 长江学者和创新团队发展计划(IRT1234)

作者(Author): 肖方闹,徐流杰,周玉成,潘昆明,魏世忠

DOI: 10.13289/j.issn.1009-6264.2016.02.003

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